Answer:
the answer is 175
Step-by-step explanation:
have a good day
The correct answer is 175.
[tex]13 * 20 - 15 * 9 + 20 * 7 - 6 * 15\\[/tex]
= [tex]260 - 135 + 140 - 90[/tex]
= [tex]400 - 225[/tex]
= 175.
